dr a. willey ix the loyalty islaxds, sew britaix, etc. 69 



Family. Stroxgylosomatidae. 



Asckistodesmus, gen. nov. 



PL VI, Figs. 4— 4c. 



Resembling Strongylosoma, but differing in the entire absence of transverse sulcus 

 upon the dorsum of the keel-bearing portion of the segments. Caudal process nearly 

 parallel-sided, oblong, with truncate, lightly emarginate posterior border, tubercles not 

 apparent. Sterna grooved longitudinally and transversely, with backwardly directed 

 tuberculiform spines at the bases of the legs. 



(15) Aschistodes)>uis maculifer, sp. n. 



Colour of head, antennae and segments entirely black, with a median yellow spot 

 on the posterior portion of the dorsum of the keel-bearing portion of the segments ; 

 sterna and legs flavous. 



Head smooth, antennae with segments from the second to the sixth gradually but 

 only slightly increasing in length and thickness. Dorsum of all the segments smooth 

 and polished ; groove not sculptured. Keels conspicuous but small, with thickened margin, 

 posterior angle produced, anterior strongly convex. Lateral surface smooth, without crest 

 above the stigmatiferous tubercles. Legs with femur and tarsus the longest segments, 

 femur about as long as patella and tibia taken together, and a little Longer than the 

 tarsus. Anal sternite with its median process a little surpassing the lateral tubercles. 



Male with an undivided tuberculiform prominence upon the sternum of the 5th seg- 

 ment. Tarsi of legs of anterior nine segments with hairy pad. Copulatory organ (as 

 in figure) broad and spatulate, its lower surface strongly convex from side to side, the 

 external border deeply notched, a spiniform process behind the notch, internal border 

 sinuate, the external surface anteriorly produced into a broad curved process bearing 

 two slender nearly filiform processes; upper surface bearing two short hooked processes, 

 one external, the other internal. 



Measurements in millimetres. Total length 27 mm., width 3 mm. 



Loc. New Britain. 



Order. SPIROBOLOIDEA. 



Genus. Rhinocricus, Karsch. 



(16) Rhinocricus cristovalensis, sp. n. 



PI. VI, Fig. 5. 



Colour (in alcohol) a tolerably uniform olive brown, paler below, dorsum of segments 

 marked by a median black longitudinal band with a yellow or red stripe on each side 

 of it, the latter only about half the width of the former; these stripes traceable from 

 about the 5th to the penultimate tergite ; legs and antennae ochre yellow. 



